1000 MW超超临界塔式锅炉水冷壁水动力特性计算及壁温分布研究  

Calculation of Hydrodynamic Characteristics of Water-Cooled Wall of 1 000 MW Ultra-Supercritical Tower Type Boiler and Wall Temperature Distribution Study

作　　者：徐荣田 杨冬[2] XU Rongtian;YANG Dong(CHN Energy Ningxia Power Co.,Ltd.,Yinchuan 750004,China;State Key Laboratory Of Multiphase Flow In Power Engineering,Xi'an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国家能源集团宁夏电力公司,宁夏银川750004 [2]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《锅炉技术》2023年第3期22-29,共8页Boiler Technology

摘　　要：针对某电厂1 000 MW超超临界塔式锅炉结构特点,采用流动网络系统,根据质量、动量、能量守恒方程,建立了适用于超超临界塔式锅炉水冷壁水动力计算的模型。水动力计算结果得到:某电厂1 000 MW超超临界塔式锅炉在1 000 MW负荷、750 MW负荷和400 MW负荷下,压降计算结果与实炉数据吻合,并且,程序计算得到的上下炉膛出口汽温与某电厂实际运行数据整体上也比较符合。计算结果表明:下炉膛和上炉膛的水冷壁内壁温度、外壁温度、中间点壁温与鳍片温度均处于材料许用范围之内,水冷壁运行是安全可靠的。并对锅炉在400 MW低负荷运行时的流动稳定特性进行了计算校核,校核计算表明:在400 MW负荷下,流动处于稳定区,水冷壁不会发生流动不稳定性。For the structural characteristics of the 1 000 MW ultra-supercritical tower type boiler of a power plant,a flow network system was used to establish a hydrodynamic calculation model for the water-cooled wall of the ultra-supercritical tower type boiler based on the equations of conservation of mass,momentum and energy.The results of the hydrodynamic calculations show that the pressure drops of the 1 000 MW ultra-supercritical tower type boiler under 1 000 MW,750 MW and 400 MW loads in a power plant are consistent with the actual furnace data,and the upper and lower chamber outlet temperatures calculated by the program are generally consistent with the actual operating data of this power plant.The calculation results show that the inner wall temperatures,outer wall temperatures,mid-point wall temperatures and fin temperatures of the water-cooled walls of the lower and upper furnaces are all within the allowable range of materials,and the operation of the water-cooled walls is safe and reliable.The flow stability characteristics of the boiler under 400 MW low load operation are calculated and calibrated,and the calibration calclation shows that under 400 MW load,the flow is in the stable zone,and the flow instability of the water-cooled wall will not occur.

关 键 词：超超临界塔式锅炉 水冷壁 水动力计算 壁温分布 不稳定性 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]